Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b56dc0fba1d9454…

MALICIOUS

PDF

82.7 KB Created: 2021-06-25 15:04:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 82fc7bd07a89dc9253de8033b04f3862 SHA-1: 1cfaa263ad5fa2dc4abc4f41744813eef29fe15b SHA-256: 2b56dc0fba1d94548ea29683c8082477c619f8e83a969650d8de28adb09ac74d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, with several heuristics indicating it functions as a link farm. Notably, some links point to compromised CMS upload storage, suggesting an attempt to lure users to malicious or compromised sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://agiusfuneraldirectors.com/files/file/11918587568.pdf
    • http://botosani.ro/img/uploads/file/waxodil.pdf
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607568ee78209---puxupolurari.pdf
    • http://schroniskoorzechowce.pl/ckfinder/userfiles/files/67309935467.pdf
    • http://canxetaianhduc.com/images/file/tofod.pdf
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607001a8a4249---26963463522.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/9e4c7a4fa3b9a8bdd020c9d847d32fec/xamikabusu.pdf
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/c54bb09e587700e47470c3d2f8197d4a/77073926284.pdf
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb514259b06---38787763247.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074917c58583---tixarijilesazomodimuf.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/16080cbd6e0c32---fovejidolivawiximorum.pdf
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077ffb9c941a---xumejapupoga.pdf
    • http://vmkmsz.hu/userfiles/file/tovat.pdf
    • http://nesthomes.in/userfiles/file/66560958331.pdf
    • http://abwmountvernon.com/uploads/files/99352405750.pdf
    • https://sardavetri.it/userfiles/file/6176988485.pdf
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/lofetaxet.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/1fd600c6d9dc94b937ad3ade379478da/tejojo.pdf
    • http://kasargod.net/uploads/file/fejusezeganarisixakab.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=contrast+past+simple+and+present+perfect
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfcd.bin
f58b8f9835582f9faf0f7ec03cf07f7f81e4559a767dcf825c6582ad982757f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCD 10812 bytes
font_01_sfnt_off0000f8c0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C0 16792 bytes
font_02_sfnt_off000110d2.bin
2cca1ab378d0865d84b18b76cd7d508747aa1462f56e3a9ca4b19855773192bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110D2 17096 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.